[mythtv-users] PAL-I problem

Nick knowledgejunkie at gmail.com
Fri Aug 19 22:09:11 UTC 2005

On 8/19/05, Steve Wesemeyer <swesemeyer at ntlworld.com> wrote:
> On Sunday 07 August 2005 10:14, Steve Wesemeyer wrote:
> > Hiya,
> <snip>
> >
> > I have a Hauppauge Primio WinTV PCI-FM (cx8800) card and it works great
> > when watching LiveTV. However, as I live in the UK which uses PAL-I I need
> > to manually set "v4lctl setnorm PAL-I" when I first start-up mythfrontend.
> > That's no problem when I boot up the machine as I just stuck it into a
> > small shell-script in the .kde/Autostart directory.
> > So watching TV is no problem. However, I have yet to manage to get a proper
> > recording. MythBackend insists on changing the PAL norm back to BG
> > and so it starts recording the picture ok but obviously not the sound
> > (effectively it just records white noise/static due to the difference in
> > audio channels in PAL-I and BG).
> <snip>
> > Cheers,
> >  Steve
> I have been told about helpful tip on the v4l mailing list which I just want
> to cross-post here in case anyone else has this problem:
> This is curtesy of Andrew Wilkinson:
> <quote>
> I've got my cx88 based card working in TvTime and MythTV, though I did
> have to do a nasty hack to make it work...
> In cx88-video.c change (it's about line 1,389) from
> cx88_set_tvnorm(dev->core,&tvnorms[i]);
> to
> cx88_set_tvnorm(dev->core,&tvnorms[4]);
> The recompile, install and load the cx8800 and cx88xx modules.
> This ignores the tv norm the application is using and forces it to use
> PAL_I. Seeing as I doubt I'll ever be using my computer somewhere that
> isn't PAL_I this is a reasonable thing to do.
> I'm sure there is a better way to do this, but I think it's down to
> TvTime and MythTV only letting you set PAL rather than PAL_I, and PAL
> seems to default to PAL_BG.
> </quote>
> Applying this fix appears to fix my PAL-I/PAL-BG problems.

I've just read the v4l post and have the linked post open in another
tab. I'll give it a go on my Hauppauge WinTV framegrabber cards. It's
a shame a hack like this is still needed, but great to know there is a
relatively straightforward fix for it.

Does the bttv driver have the same issues?


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